Variable-speed device.



C. RYDBN.

VARIABLE SPEED DEVICE.

APrLIoATIoN FILED JUNE 19, 1913.

Patented Feb. 3, 1914.

4 SHEETS-SHEET 1.

TTONET G. RYDEN.

VARIABLBSPEBD DEVICE.

APPLICATION FILED JUNE 19, 1913.

1,085,942. y Patented Feb. s, 1914.

4 SHEETS-SHEET 2.

WITNESSES Mis@ COLUMBIA PLANOGRAPH C0..wASHlNdToN. D. c.

C. RYDBN. l VARIABLE SPEED DEVICE. APPLICATION FILED JUNE 19, 1913.

1,085,942. Patented Febf3,1914.

4 SHEETS-SHEET 3.

WITNESSES N NTOR fmw@ 9%. P /T Z @www W coLUMBlA PLANDGRAPH COWASHINGTQN. DA C.

G. RYDEN.v

VARIABLE SPEED DEVICE.

APPLIOATION FILED JUNE 19, 1913.

4 SHEETS-SHEET 4.

WITNESSES 2 INVETo Y e n 9;/ u

COLU BIA FLANOG GTON D C mvrTnn sTATns PATENT onirica.

CLAES RYDEN, OF CRANSTON, RHODE ISLAND, ASSIGNOR T0 UNIVERSAL WINDING COMPANY, OF PORTLAND, MAINE, A CORPORATION 0E MAINE.

VARIABLE-SPEED DEVICE.

To all 107mm t may concern Be it known that I, CLAES RYDEN, a citizen of the United States, residing at Cranston, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Variable- Speed Devices, of which the following is a specilication.

My invention relates to variable-speed devices for controlling the rotation of shafts or other machine elements and consists of improvements in the structure'and arrangement of the mechanism thereof.

The object of my improvement is to provide a simple and efficient means for starting the rotation of the shaft, spindle or other driven-element at a relatively slow rate of speed; then gradually increasing the speed until the desired maximum is attained; and thereafter continuing the rotation at a fixed or constant rate.

The invention is fully described in the following specification, illustrated by the accompanying drawings, in which like reference characters designate like parts.

In the drawings :-Figure 1 is an end elevation of my new device showing it applied to a rotatable shaft or spindle; Fig. 2 is a side elevation of a portion of the same, looking in the direction indicated by the arrow y, Fig. l; Fig. 3 is a plan view of the main portion of the mechanism with the elements shown partially in section on the line X-X of Fig. l; Fig. i is a detail view of the screw-cone, friction driving-element of the device; Figs. 5, 6 and 7 are detail views of portions of the lockingor detentmechanism of the device.

My new device may be applied to a variety of purposes, but is particularly adapted for use on winding machines and similar textile apparatus for controlling the rotation of high-speed spindles or other driven-shafts.

I have preferred to here illustrate the im proved mechanism as applied to a winding machine and adapted to control the rotation of the winding-spindle. In machines of this character it is very desirable to start the rotation of the spindle at a relatively slow speed in order to' avoid strainingor breaking the material being wound thereon. This is especially important when line yarns or delicate threads are being handled and particularly so when the material is being Speccation of Letters Patent.

Application filed .T une 19, 1913.

strain on the yarn.

Patented Feb. 3,1914. serial No. 774,649.

I l unwound from rotating supply-spools, reels or swifts. Obviously, it is of yadvantage to wind the material at as high a rate of speed as consistent with its strength and the mam difficulty hereto experienced has been 1n starting the rotation of the spindle so as not to impose a too sudden shock vor In my present improvenient I provide means for starting the 'rotation of the spindle at a comparatively low rate of speed; then, through the action of the automatic controlling-mechanism, the speed is gradually accelerated until the maximum is reached; and thereafter it is maintained uniform until the operation of the spindle is arrested, Through this automatic control I am enabled to provide advantages particularly important as regards the use of the device on textile machinery as above pointed out; but I do not herein limit myself yexclusively to such a use as the invention is capable of other applications not herein described.

Referring rst to Fig. 2, A designates a portion of the frame of a winding machine which is formed with members a and a supporting bearings b, b for the rotatable winding-spindle or shaft B. Adjacent the bearing b', and in line therewith, is a third bearing b2 supported in the frame-member ai and adapted to receive one end of a driving-shaft B, see Fig. 3, the opposite endbearing therefor not being here shown. The bearings b, o', b2 are preferably all of the same construction and as here illustrated are of the ball type. are fitted to the machine-members a, a', a2 and cooperate with the collars b4 secured on the shafts B and B to receive the balls b5. The balls 225 run in suitable grooves inthe collars b4 and the ends of the bearings are closed by tight-fitting caps be.

Mounted on the driving-shaft B adj aoent the bearing b2 is a belt-pulley C secured rotatively therewith by means of the set-'screw c. rIhe hub c of the pulley C is formed at its end with a tapered flange c2 adapted to serve as a friction driving-means for a disk I) to be later described. As here shown the pulley C has a second flange c3 at the opposite end of its hub and thismay be used to drive another disk D which can be arranged to operate a train of elements similar to those now to be described. In this way the shaft B may be adapted to drive a pair of wind- Suitable ball-races b3v ing-spindles arranged in axial alinement herewith, but as the speed-controlling devices would be alike at both ends only one is here shown and described. The shaft B is turned down at 227, where it passes through the bearing i712, and mounted on its outer end is a clutch-collar E secured in position by the pin e extending through the. shaft. The outer face of the collar E is formed with ratchet-teeth c adapted to engage with oppositely-formed teeth f on a clutch-member F, see also Fig. 2. The member F is adapt ed to slide on the end of the spindle or shaft B and is secured rotatively therewith by means of a spline or key f. The key f is fastened in the bore of the member F by means of a pin f2 and slides in a keyway bs which extends substantially the whole length ofthe shaft B. A portion of the key f is reduced in thickness at f3 to allow it to project through the bearing ZJ. The clutch-member F is slid on the shaft B, to engage its teeth f w`th the teeth e of the collar E, by means of a sliding element G which is adapted to contact with the end of the key f. In Fig. 3 the member F is shown as withdrawn from engagement with the collar E and a detentpin f* serves to maintain it in its retracted position. The detent-pin f4 is fitted to slide in a transverse hole 00 in the shaft B and has its end beveled off to adapt it to engage a slight depression or V-shaped notch f5 on the under side of the key f. A spring f in the hole b9 serves to normally maintain the pin f* in engagement with the notch f5, but when the member F is moved into engagement with the collar E the pin f* is depressed against the action of' the spring and then rises to engage a second notch f7 in the key f. In this way the detent-pin f4 acts to en gage one or the other of the notches f5, f7 and serves to maintain the clutch-member F against accidental displacement. 1t will be noted that the member F is formed with a peripheral, tapered flange f8 which is adapted to be engaged by the beveled end Zz of a lever H to force the member F away from engagement with the collar E as later explained.

rThe friction-disk D which is driven from the pulley C is mounted on the end of a countershaft l. arranged at an angle to the shaft B, in the same axial plane therewith, and adapted to rotate in two bearings j, j of a swinging bracket J. Referring to Figs. 1 and 2, the bracket J is of rectangular shape with two legs jg, jg pivoted on a rod je' extending horizontally from the side of the main frame A. The disk D is formed with a hub (Z secured to the shaft I by the pin Z and is provided with screw-threads (Z2 on its periphery. The rim of the disk D is beveled olf at [Z3 to adapt it to engage the outer face of the flange 02 of the pulley C and a second disk D arranged parallel with the main disk has its rim engaging with the inner, beveled face of the flange c2.y The auxiliary disk D is mounted loosely on the hub (Z and is held rotatively with the disk D by means of a stud CZ* projecting from the latter to engage the hole (Z5. Screwed on to the end of the hub (Z is a collar c between which and the disk D is a saucer-shaped spring (Z7. The spring (Z7 tends to force the disk D toward the disk D and thereby provides a frictional grip between the rims of the two disks and the sides of the flange c2. By adjusting the collar (ZG on the hub CZ the tension of the spring (Z7 can be varied to regulate the pressure of the disks D, D against the flange c2.

Mounted on the shaft l between the bearings j, j of the bracket J is a friction driving-cone K secured rotatively with the shaft be means of the set-screws Z2, Z; extending through its hub 7c. Referring particularly to Fig. Il, the periphery of the cone K is scored with relatively deep screw-threads k2 having a slight pitch or lead from one end to the other. The threads k2 are lefthanded and are adapted to engage with the beveled flange Z of a friction-disk L mounted on the member G which takes the form of a sleeve adapted to slide on the spindle B. The sleeve G is formed with a flange or head f/ at one end against which the disk L is held yieldingly through the action of a spring g. The spring g surrounds the sleeve G with one end held by a wire ring g2 sprung into a groove g3, while its opposite end bears against the disk L. The disk L has its bore Z formed slightly convex to provide for a limited rocking movement with respect to its axis, and carries a transverse pin Z2 projecting into an enlarged hole gt in the head g of the sleeve G. 1n this way the disk L is held rotatively with the sleeve G, but at the same time it can be moved slightly out of a right-line position in relation to the axis of the sleeve. The purpose of this arrangement is t-o provide for a slight floating movement of the disk L on the sleeve G so that it can find its proper relation to the threads 7a2 on the cone K when t-he two are carried into mesh with each other. As before stated, the sleeve G is free to slide on the spindle B, but is held rotatively therewith by a key g5 engaging the keyway Z13. Normally, the sleeve G is maintained in the position illustrated by full lines in Fig. 3 by a springpressed yoke G, see Fig. 2. The yoke G is fitted to a groove g on the periphery of the sleeve G, and reaching upwardly therefrom is attached to a sleeve G2 mounted to slide on a rod M which extends through the frameemembers a, a and a2. Surrounding the rod M is a coiled spring m arranged with one end bearing against the framemember a while its opposite end bears Vio against the yoke G. The tendency of the spring m is to slide the yoke G and sleeve G .in the direction indicated by. the arrow e, Figs. 2 and 3, and themovement o-f the sleeve Gr in this direction is limited by a buffer-spring G3 mounted on the spindle B. Freferably, the spring G2. is of saucer-shape having a central portion gT surrounding the spindle B with prongs gs reaching radially out-ward therefrom to bear against the bearing cap o6.

As before explained, the bracket J is mounted free to swing on its bearings on the rod j3 and its position is controlled by means of an upwardly-extending arm N held fast on the rod by a set-screw 7i. The arm N and bracket J are yieldingly-connected by a spring 7i arranged as follows: One end of the spring 7?. is hooked through a hole 7b2 at the upper end of the arm N and its opposite end is fastened to a stud j4 eX- tending through a hub 7'5 on the bracket J. The stud j* has a longitudinal slot jG which is engaged by a pin jT in the hub j5, to keep it from turning, while its outer end is threaded to receive a nut js. By turning the nut jS the stud j4 can be adjusted longitudinally in the hub to vary the tension of the spring 7%. Below the spring 77, a pin 7a3 reaches laterally outward from the arm N to receive a second coiled spring 774 which bears against a boss j9 on the bracket J. The spring 7L4 is slightly stronger than the spring 77. and serves to hold the arm N and bracket J the proper distance apart. Secured to the rod 7'3 by a set-screw 710 is a horizontalijf-extending operating-handle N through which the rod j2 and arm` N are rocked manually for a purpose as later eX- plained. At the top of the arm N is a detent-catch which serves to hold the arm in the position illustrated in Fig. l to cause the spring 77. to maintain. the friction-disks D, D in engagement with the flange c2. Normally, the action of gravity tends to swing the bracket J outward to carry the disks D, D away from the pulley-flange c2. and a stop-pin a? projecting from the side of the frame A is adapted to limit the movement of the bracket in this direction.

The detent-catch or lock for the arm N consists of a three-armed lever O pivoted on a rod o secured in the hub a2 of thenframe A and extending horizontally therefrom, see Figs. l, 2 and 5. One arm o of the lever extends across the upper end of the arm N, as shown by dotted lines in Fig. l, and is formed with a shoulder 02 adapted to engage with the edge thereof. Referring to Fig. 2, a.. coiledspring o3 surrounds the rod o with one of its ends engaging a hole o4 in the lever O while its opposite end is held by a collar o5 secured to the rod by the setscrew 0.6. The tendency of the spring o3 is to hold the lever O locked in engagement with the arm N as illustrated in Figs. 1 and 5. Another arm 07 of the lever 0 extends upwardly and carries at its end a knock-off device P, shown more particularly in Figs. 3 and 5. This consists of a stud 79 formed at its end with av forked head 77" in which is mounted a wheel or disk 792 pivoted on the pin 702'. The threaded end of the stud 77 eX- tends through a hub o8 at the end of the arm 07 and is formed with a longitudinal gro-ove 7J* which is engaged by a pin 795, see Fig. 5, to keep the stud from turning in the hub. rlwo nuts 726, 776 are screwed onto the stud 79 and set up against the opposite ends of the hub 0S to hold the stud in position. By adjusting the nuts 79 on the stud 7) its posit-ion in the hub 0S can be changed to regulate the relation of the wheel 792 to the spindle B, see Fig. 3. It will be noted that the periphery of the disk 772 is beveled ed on one side which adapts it to be engaged by the beveled face 99 of the head g on the sleeve G. f

This engagement occurs when the sleeve G has been slid along the spindle B to the position illustrated by dash lines in Fi 3 through the action of the friction-cone K as more fully described hereinafter. The edect of this engagement is to force the knock-ofia d-evice P away from the spindle B and this action rocks the lever O against the tension of its spring 03 to release the detent-arm o from the end of the arm N.

As before stated, the rod 0 is held fast in its bearing in thev frame A and a lever R is mounted free to turn on the rod adjacent the hub of the lever 0. Referring to Fig. 6, the lever R is formed with a laterally-extending arm 7 terminating in a hub 7" in which is secured a rod S- by means of a setscrew s. The rod S is also held in a similar hub 7L supported on an arm h2 reaching o-ut from the hub 7b2 of the lever H, see Fig. 7. Through this means the rod S is adapted to swing bodily about the axis of the rod o in the direction indicated by the arrow 2, Fig. l. The movement of the rod S in this direction is limited by a lug ci* projecting from the side of the frame A, with which it is adapted to contact, see Fig. l. The lever R is formed with a depending arm 772 formed at its end with a hub 7'3 through which a screw 7A projects. The end of the screw 7n4 is preferably rounded o at 7v5 and is adapted to be engaged by a lug 77.5 on the arm N, see Figs. 1 and 2. The screw .7'h4 is adjustable in the arm 712 and is held in position by a check-nut r6. The engagement of the lug 77,5 with the screw 7at provides for moving the lever R from the movement of the arm N when the latter is rocked by the handle N. Projecting laterally from the arm 772 above the hub 773 is a lug 7a7 carrying an adjustable screw 7d8 secured in position by the check-nut r9. The rounded end of the screw r2 is adapted to engage the lower end the two shafts B and B to be coupled together so that the spindle B is rotated positively from the shaft B. At this juncture the beveled face g9 on the head g of the sleeve G comes into contact with the beveled periphery of the wheel p2 of the knock-off device P. This engagement serves to rock the lever O to raise its detent-arm 0 from the arm N and the force of gravity will then act to swing the bracket J outward to carry the disks D, D away from the pulley-flange c2. This outward movement of the bracket J, which is limited by the stop-pin a7, also carries the friction-cone K away from the disk L and the spring m acting on the yoke G then slides the sleeve G back into its normal position, as illustrated by full lines in Fig. 3. The speed-controlling elements are now in their initial positions wit-h the disks D, D released from engagement with the driving-pulley C and therefore the countershaftwill remain at rest until the spindle B is started again in the manner above described. The spindle B is now coupled positively with the shaft B so as to be driven at the maximum rate of speed as imparted through the driving-element or pulley C.

To arrest the rotation of the shaft or spindle B it is only necessary to rock the rod S with respect to the rod 0 in the direction indicated by the arrow 2, Fig. l. A very slight movement of the rod o as just described will act to release the detent-shoulders on the arm T and lever U and the spring a will then act through the lever U to press the arm T farther outward. This movement of the arm T is continued until the clutch-lever H engages the beveled iange fs on the member F and slides the latter on the spindle B to withdraw it from engagement with the clutch-collar E on the shaft B, as shown in Fig. 2. The movement of the rod S may be accomplished manually or through the operation of suitable knock-ofi devices, not here shown or described, but well known from their use on winding and like machines.

Should the operation of the stoppingmechanism take place immediately after the shaft B is started and while the countershaft I is being driven from the pulley C the disks D, D will be thrown out of engagement with the pulley automatically as now described: The movement of the rod S downward to release the detents on the arm T and lever U serves to rock the lever R to bring its screw rs into Contact with the lower end of the arm 09 on the lever O. This engagement serves to rock the lever O to raise its detent-arm o from the end of the arm N and the latter is thereby released to allow the frame J to swing outward from the frame A. This movement of the frame J carries the disks D, D away from the pulley-flange c2 and also releases the drivingcone K from the friction-disk L, as before described, and in this way the parts are returned to their initial positions again so as to be in place to start the spindle B in the manner as before described.

It will be seen that my invention provides a very simple yet eflicient means for starting the rotation of the shaft or spindle inductively at a relatively slow speed, and for accelerating this speed until the maximum is reached, whereafter the driving connections are made positive. In this way the rotation of the shaft can be brought gradually up to the maximum without imposing shock or strain on the material being operated upon and the operating parts themselves are also saved from undue strain and wear. It is also pointed out that the device is entirely automatic and so arranged that the starting-devices, that is the friction driving-connections, are only in operation during the time required to start the shaft. As soon as the shaft is driven positively these elements are disconnected and remain at rest until the shaft is again started so that they are not subjected to any unnecessary wear.

Various modications might be made in the form and arrangement of the parts of my new device and in the manner of their application without departing from the spirit or scope of the invention.

Therefore, without limiting myself to the exact construction shown and described, what I claim is l. In a variable-speed device, the combination with a rotatable friction-cone formed with peripheral threads leading from one end to the other, of a disk arranged to contact with the surface of the cone to rotate therewith and adapted to engage the threads on the cone to cause a relative axial movement between the two members.

2. In a variable-speed device, the co-mbination with a rotatable driving-cone formed with threads leading from one end to the other of its peripheral surface, 'of a frictiondisk engaging said threads to feed it longitudinally with respect to the cone during its rotation thereby in the manner and for the purpose described.

3. In a variable-speed device, the combination with a friction-cone formed with V- shaped threads leading from one end to the other' on its periph-ery, and a friction-disk formed with a tapered, peripheral flange adapted to be engaged by the threads on the cone to cause a relative axial advance between the cone and disk during their rotation one from theother.

4. In a variable-speed device, the combination with two shafts, of a friction-cone mounted on one of the shafts and formed with external screw-threads leading from tit one end to the other, and a disk mounted on the other shaft and adapted to be driven from the cone and to engage the threads thereof to cause it to travel longitudinally of the axis of the latter.

5. 1n a variable-speed device, the combination with a spindle, of a friction-disk keyed to said spindle and adapted to slide longitudinally thereof, and a friction-cone formed with peripheral threads leading from one end to the other and adapted to engage with the disk to cause the latter to travel longitudinally of the axis of the cone while being driven therefrom.

6. 1n a variable-speed device, the combination with a driving-element, of a countershaft adapted to be driven therefrom, a friction-cone mounted on the counter-shaft and formed with peripheral threads leading from one end to the other, a spindle arranged opposite the countershaft, and a friction-disk keyed to said spindle and adapted to be engaged by the cone to drive the spindle as it feeds from one end to the other of the cone while traveling in the threads.

7. In a variable-speed device, the combination with a spindle, of a friction-disk secured rotatively therewith, a friction-cone formed with peripheral threads leading from one end to the other, and manuallyoperable means for causing contact between said cone and disk whereby one is rotated from the other with the threads on the cone engaging the periphery of the disk to cause an axial advance between the two.

8. In a variable-speed device, the combination with a rotatable friction-disk formed with a tapered periphery, of arotatable friction-cone formed with tapered peripheral threads leading from one end to the other, and means to engage the threads on the cone with Jthe periphery of the disk to cause rotation between the two members and an axial advance of one member with respect to the other.`

9. lin a variable-speed device, the combination with a drivingand a driven-shaft, of a friction-disk secured rotatively with one of said shafts, a friction-cone secured rotatively with the other shaft and formed with screw-threads on its periphery, and means to adjust the shafts laterally in relation to each other to engage the threads on the cone with the periphery of the disk to cause the rotation of one shaft from the other at a constantly varying speed.

10. In a variable-speed device, the combination with a driving-shaft, of a frictioncone secured rotatively with said shaft and formed with screw-threads on its periphery, a driven-shaft, a friction-disk secured rotatively with said driven-shaft and slidable longitudinally thereof, means to adjust said shafts in lateral relation to engage the disk with the threads on the cone, and detentmeans to maintain the cone in engagement with the disk to rotate the latter and cause an axial displacement therebetween to vary the speed of the driven-shaft.

11. 1n a variable-speed device, the combination with a shaft mounted to rotate in fixed bearings, of a friction-disk on said shaft, a countershaft, a movable bracket having bearings for the countershaft, a friction-cone on said countershaft formed with peripheral screw-threads, means to move the bracket to engage the threads of the cone with the periphery of the disk, and detentmeans to maintain the bracket in position with the cone and disk in engagement.

12. In a variable-speed device, the combination with a shaft rotatable in fixed bearings, of a friction disk on said shaft, a countershaft arranged opposite said fixed shaft, a pivoted bracket supporting the countershaft to move laterally in relation to the fixed shaft, a friction-cone on the countershaft formed with screw-threads adapted to engage the periphery of the friction-disk, a pivoted arm, a spring connecting the arm with the bracket, and means to swing the arm to bring the cone into yielding contact with the friction-disk.

13. 1n a variable-speed device, the combination with a shaft mounted in fixed bearings, of a friction-disk on said shaft, a countershaft, a friction-cone on the countershaft formed with screw-threads adapted to engage the periphery of the disk, a bracket supporting the countershaft and normally maintained in position by gravity to hold the cone away from the disk, and means to move the bracket to carry the cone into engagement with the disk.

14. In a variable-speed device, the combination with a shaft mounted in fixed bearings, of a friction-disk on said shaft, a countershaft, a friction-cone on the countershaft formed with screw-threads adapted to engage the periphery of the disk, a bracket supporting the countershaft and normally maintained in position to hold the cone away from the disk, an arm mounted opposite the bracket, a spring connecting the arm with the bracket, means to move the arm to operate the bracket to carry the cone into engagement with the disk, and detent-means to lock the arm in position to hold the bracket with the cone and disk engaged.

15. ln a variable-speed device, the combination with a rotatable friction-cone having peripheral screw threads, of a rotatable friction-disk adapted to engage said threads to cause a relative axial advance between the cone and disk to vary their ratio of speed, means to engage the cone and disk, and automatically-operated means to release them from engagement-after the disk has traversed the length of the cone.

16. In a variable-speed device, the combination with a rotatable friction-cone having peripheral screw-threads, of a. friction-disk adapted to engage said screw-threads to feed it along the cone during its rotation therefrom, means to maintain the cone and disk in engagement, and means to release them from engagement When the disk feeds to the end of the cone.

17. In a variable-speed device, the combination with a rotatable friction-cone formed With peripheral screw-threads, of a frictiondisk adapted to engage' the threads on the cone to be rotated thereby and to be fed axially along its surface from one end to the other1 means to cause the cone to engage With the disk, detent-means to maintain said engaging-means operative, and means to release the detent-means When the disk has been fed from end to end of the cone.

1S. In a variable-speed device, the combination with a rotatable friction-cone having peripheral screw-threads, of a rotatable friction-disk adapted to engage said threads to cause a relative axial advance between the cone and disk to vary their ratio of speed, means to engage the cone and disk, detentmeans to hold them in engagement, and means operated automatically to release the detent-means When the disk reaches the end of the cone.

19. In a variable-speed device, the combination with a rotatable friction-cone formed With peripheral screw-threads, of a rotatable friction-disk adapted to engage the threads on the cone to causea relative axial movement between the two, means to engage the disk and cone, means to' release them from engagement, and means to return them to their initial positions. after their disengagement.

20. In a variable-speed device, the combi- 1 nation With a rotatable friction-cone having peripheral screw-threads, of a rotatable friction-disk adapted to engage the periphery of the cone to be fed longitudinally thereon, means to engage the cone and disk, means to release them from engagement, and a spring to return the disk to its initial position after being released from the cone.

21. In a variable-speed device, the combination With a rotatable friction-cone formed with peripheral screw-threads, of a rotatable friction-disk adapted to engage the threads on the cone to be fed longitudinally thereof, means to engage the cone and disk, and means opera-ted by the disk at one end of its traverse to release it from engagement with the cone.

22. In a variable-speed device, the combination with a rotatable friction-cone formed with peripheral screw-threads, of a rotatable friction-disk adapted to engage the cone to be fed along its periphery, means t0 engage the cone and disk, means operated by the disk at one end of its tra-verse on the cone to release it from engagement therewith, and means to return the disk to its initial position after its release from the cone.

23. In a variable-speed device, the combination With a shaft, Of a sleeve keyed rota-- tively With said shaft and slidable longitudinally thereof, a friction-disk mounted on the sleeve and formed With a tapered, peripheral flange, a friction-cone formed With peripheral threads adapted to engage With the flange on the disk to travel the latter on the cone, means to carry the cone into and out of engagement with the disk, and a spring to slide the sleeve on the shaft to return the disk to its initial position after it is disengaged from the cone.

24. In a variable-speed device, the combination with a shaft, of a sleeve held rotatively on the shaft and slidable longitudinally thereof, said sleeve formed with an enlarged head at one end, a friction-cone formed with peripheral screw-threads, a friction-disk mounted on the sleeve to engage the threads on the cone and formed with a convexv bearing to allow it to rock with respect to the axis of the sleeve, a spring tending to hold the disk against the head on the sleeve, and means to secure the disk rotatively with the sleeve.

25. In a variable-speed device, the combination With a driving-element, of a spindle adapted to be driven therefrom, clutch-devices for connecting the spindle rotatively with the driving-element, a friction-cone adapted to be driven from the driving-element, a friction-disk on the spindle arranged to engage the cone to be driven therefrom and to be traversed longitudinally thereof, and means operated by said disk to render the clutch-devices operative after the disk has traversed the length of the cone.

26. In a variable-speed device, the combination with a driving-element, of a spindle adapted to be driven therefrom, clutch-devices for connecting the spindle rotatively with the driving-element, a friction-cone, means to rotate the cone from the drivingelement, a friction-disk on the spindle adapted to be driven from the cone and to be traversed longitudinally thereof, means actuated by the disk to render the clutch-devicesV operative after the disk has traversed the length of the cone, and means to disengage the cone from the disk after the clutchdevices are in operation.

27.V In a variable-speed device, the combination with a driving-element, of a spindle adapted to be driven therefrom, clutch-devices for connecting the spindle rotativelyV with the driving-element, a friction-cone, means to rotate the cone from the drivingelement, a friction-disk on the spindle adapted to be driven from t-he cone and to be traversed longitudinally thereof, means operated by the disk to operate the clutch-devices after the disk has been traversed the length of the cone, means to disengage the cone from the disk after the clutch-devices are in operation, and means to return the disk to its initial position after the cone is disengaged therefrom.

Q8. ln a variable-speed device, the combination ivith a constantly-rotating drivingeleinent. of a clutch-member connected to rotate therewith, a spindle, a clutch-member on the spindle adapted to engage the clutchnieinber eo nected with the driving-element, a counlei` Aaft adapted to be rotated from the driving-element, a friction-cone formed with peripheral threads mounted on the counter-shaft, a friction-disk held rotatively with the spindle and adapted to engage the threads on the cone to be fed longitudinally thereof during its rotation therefrom, and means to etlect the engagement of the two clutch-members after the disk has traversed the length of the cone.

.ln a variable-speed device, the combination. with a driving-element, of spindle adapted to be driven therefrom, clutch-devices for connecting the spindle rotatively with the driving-element, a friction-cone adapted to be driven from said driving-element, a friction-disk on a spindle arranged to engage the cone to be driven therefrom and to be traversed longitudinally thereof, means to engage the cone and disk, detentmeans to maintain them in engagement, means actuated by the disk to operate the clutch-devices after the oisk has traversed the length of the cone, and means actuated by the disk to release the detent-means after the clutch-devices are in operation.

30. ln a variable-speed device, the combination with a friction-disk, of a frictioncone adapted to engage the disk to rotate the latter and to cause it to be traversed on the surface of the cone, a bracket supporting said cone to carry it into engagement with the disk, a detcnt-lever to maintain the bracket in position with the cone engaging the disk, and means operated by the disk at the end of its traverse on the cone to actuate the datent-lever to release the cone from engagement with the disk.

231. lin a variable-speed device, the combination with a spindle, of a sleeve keyed to the spindle to slide longitudinally thereof, a

friction-disk mounted on the sleeve to r0- tate the spindle, a friction-cone adapted to engage the disk to rotate the sleeve and cause it to slide on the spindle, means for carrying said cone into engagementI with the disk, a detent-lever for maintaining said engaging-means operative, and a Wheel on said lever adapted to be engaged by the sleeve to more the lever to release the engagingmeans.

ln a variable-speed device, the combination with two shafts arranged in axial alinement, of a clutch-member on one of the shafts, a second clutch-member slidable on the other shaft to engage the irst clutchineinber, a ,friction-coneJ formed with peripheral screw-threads, a disk on one of the shafts adapted to engage the threads on the cone to be rotated thereby and to traverse the face of the cone, and means operated by said disk to slide the movable clutch-inem- 1 er into engagement with the other clutchmeinber after it has been traversed the length of the cone.

38. ln a variable-speed device, the combination With a driving-element formed with a friction driving-liange, a eountershaft, friction-disks on the countershaft adapted to engage the flange on the driving-member, a friction-cone on the connterslmft formed with the peripheral screw-threads, and a friction-disk adapted to engage the threads on the cone to be rotated thereby `while traversing the surface of the cone.

S-l. ln a variable-speed device, the combination With a rotatable driving-element having a beveled innige, a countershaft arranged at an at i to the axis of the driving-element, a disk o1 said conntershaft adapted to enone side of the flange on the drivingelement, a second disk on the countershaft adapted to engage the opposite side of the flange, means to press the disks together t0 inipinge npon the flange, a. friction-cone on thel countershaft formed with screw4 threads, and a friction-disk engaging the cone to be driven thereby While traversing the threads on the cone.

ln testimony whereof l ailix my signature in presence of two Witnesses.

CLAES RYDEN.

VJ itnesses nari-ina A. ireann o'roN, Hinznnirr K. ALLARD.

Cepies o1? this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

